Influences of construct properties on the proliferation and matrix synthesis of dedifferentiated chondrocytes cultured in alginate gel.
Fiche publication
Date publication
janvier 2008
Auteurs
Membres identifiés du Cancéropôle Est :
Pr BOSCHI-MULLER Sandrine, Dr DE ISLA Natalia
Tous les auteurs :
Wang Y, De Isla N, Decot V, Marchal L, Cauchois G, Huselstein C, Muller S, Wang BH, Netter P, Stoltz JF
Lien Pubmed
Résumé
To investigate whether the chondrocytes-alginate construct properties, such as cell seeding density and alginate concentration might affect the redifferentiation, dedifferentiated rat articular chondrocytes were encapsulated at low density (LD: 3 x 10(6) cells/ml) or high density (HD: 10 x 10(6) cells/ml) in two different concentrations of alginate gel (1.2% or 2%, w/v) to induce redifferentiation. Cell viability and cell proliferation of LD culture was higher than those of HD culture. The increase in alginate gel concentration did not make an obvious difference in cell viability, but reduced cell proliferation rate accompanied with the decrease of cell population in S phase and G2/M phase. Scan electron microscopy observation revealed that chondrocytes maintained round in shape and several direct cell-cell contacts were noted in HD culture. In addition, more extracellular matrix was observed in the pericellular region of chondrocytes in 2% alginate culture than those in 1.2% alginate culture. The same tendency was found for the synthesis of collagen type II. No noticeable expression of collagen type I was detected in all constructs at the end of 28-day cultures. These results suggested that construct properties play an important role in the process of chondrocytes' redifferentiation and should be considered for creating of an appropriate engineered articular cartilage.
Référence
Biorheology. 2008;45(3-4):527-38.